EMConversation.h

#import <Foundation/Foundation.h>

#import "EMMessageBody.h"

/*
 *  \~chinese
 *  会话类型
 *
 *  \~english
 *  Conversation type
 */
typedef enum{
    EMConversationTypeChat  = 0,    
    EMConversationTypeGroupChat,    
    EMConversationTypeChatRoom      
} EMConversationType;

/*
 *  \~chinese
 *  消息搜索方向
 *
 *  \~english
 *  Message search direction
 */
typedef enum{
    EMMessageSearchDirectionUp  = 0,    
    EMMessageSearchDirectionDownload    
} EMMessageSearchDirection;

@class EMMessage;

@interface EMConversation : NSObject

@property (nonatomic, copy, readonly) NSString *conversationId;

@property (nonatomic, assign, readonly) EMConversationType type;

@property (nonatomic, assign, readonly) int unreadMessagesCount;

@property (nonatomic, copy) NSDictionary *ext;

@property (nonatomic, strong, readonly) EMMessage *latestMessage;

- (BOOL)insertMessage:(EMMessage *)aMessage;

- (BOOL)deleteMessageWithId:(NSString *)aMessageId;

- (BOOL)deleteAllMessages;

- (BOOL)updateMessage:(EMMessage *)aMessage;

- (BOOL)markMessageAsReadWithId:(NSString *)aMessageId;

- (BOOL)markAllMessagesAsRead;

- (BOOL)updateConversationExtToDB __deprecated_msg("setExt: will update extend properties to DB");

- (EMMessage *)loadMessageWithId:(NSString *)aMessageId;

- (NSArray *)loadMoreMessagesFromId:(NSString *)aMessageId
                              limit:(int)aLimit
                          direction:(EMMessageSearchDirection)aDirection;

- (NSArray *)loadMoreMessagesWithType:(EMMessageBodyType)aType
                               before:(long long)aTimestamp
                                limit:(int)aLimit
                                 from:(NSString*)aSender
                            direction:(EMMessageSearchDirection)aDirection;

- (NSArray *)loadMoreMessagesContain:(NSString*)aKeywords
                               before:(long long)aTimestamp
                                limit:(int)aLimit
                                 from:(NSString*)aSender
                            direction:(EMMessageSearchDirection)aDirection;

- (NSArray *)loadMoreMessagesFrom:(long long)aStartTimestamp
                               to:(long long)aEndTimestamp
                         maxCount:(int)aMaxCount;

- (EMMessage *)latestMessageFromOthers;


@end